About us

About us

We pride ourselves on finding innovative solutions to challenging projects. 

Based at Cromford Mills in Derbyshire, we are a ‘one-stop shop’ providing Architectural Design, Planning Advice, Project Management and Construction all under one roof.

Everything under one roof

We specialise in building, extending and renovating homes in the Derbyshire Dales, the Peak District and Beyond. 

OakenStone is the culmination of years of work in the home conversion and extension industry and was launched to offer a real world solution to the issues of finding the best tradesmen to get the job done on time and to standard. 


Understanding what matters to you, we will develop a detailed solution for your approval and present it in a form that enables your ideas to become reality


Whether it's Planning Permission or Pre-construction planning, let our wise & experienced team drive your project through. We have experience working with all the local Planning authorities and bodies.


A team of skilled and committed tradesmen led by passionate design and project managers. It's not just bricks and mortar - it's your home and it should be perfect

An intimate knowledge of the administration of the planning system.

Let us help you navigate through the maze of planning rules and regulations 

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Design and Management team

We work with a wide range of local building contractors depending on the needs of project. 

James Probert

Director - Head of Technical Design
James is the co-founder of Oakenstone along with close friend and colleague, Dave Mowle.

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Dave Mowle

Director - Designer and Operations Manager
As Oakenstone’s lead designer and value engineer, Dave will often be your first point of contact on-site. Some say he looks familiar

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Richard Bradbury

Before joining OakenStone, Richard worked as a consultant with Dave and James for over twenty years on a wide range of local projects.

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Marcus Bell

He’s THE FINISHER which sounds brutal but as he puts it, he gets to do all the pretty things; everything from plastering onwards is his domain.

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Pete Newberry

Operations and Administration Support
Pete is the first point of contact for any client calling the office and runs the day-to-day administration of the office .

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Oliver Edwards

Building Designer
Olly is the newest member of our team and is one of our CAD wizards.

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Office Security
Hero spends most of her time milling about the office. All visitors are more than welcome to accept the challenge of trying to pull the tennis ball out of her mouth.

Why choose OakenStone for your next building project?

The design and construction team at Oakenstone are committed to helping you throughout the entire design & construction process: from the first blueprint to the last installed door knob.

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Understanding what matters to you

Experienced team

OakenStone is all about flexibility, innovation and, above all, satisfied customers.

Our team of experienced designers and dynamic tradesmen will focus on your precise wishes to deliver cost-effective solutions to any project.

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Whether it's a single room or whole house project

Creating a home for you

We understand that your home will probably be the largest investment of your life, and we want you to sleep peacefully at night knowing that you have the best-built house on the market.

We offer a building service including full project management.

One Stop Shop

We will manage the entire project, from discussing initial ideas through to the finished build.

Clear Pricing

Our competitive quote will clearly set out all the costs you will have to pay with no ‘hidden suprises’.

Dedicated Manager

Your dedicated project manager will remain in touch with you throughout the project

Local Knowledge

We have a good relationship with the planners & work with a variety of local tradesmen & suppliers

Our passion is bringing harmony between the old and the new at an affordable price. Whether it's a single room or whole house project, we relish the process of making the best of the past, giving it a fresh life and integrating it with the benefits of modern materials, methods and technology.
James Probert
Director, OakenStone

Frequently asked questions

Will I also need an architect?

For the vast majority of projects, you don't need an architect. Although we are not architects, we do offer the full Architectural Design service with the added value that we will see it through to the finished construction.

What sort of budgets do you work with?

Our projects have budgets starting in the region of £50,000. Some of our larger housing projects are in the multi-million pound. If you are looking at a smaller project, such as a bathroom redesign, then we're probably not going to be the best fit for you.

Why should we choose OakenStone?

Because our team will take personal expert care of your project from the day you first talk to us until the time you have settled into your newly improved home. View our short film explaining why people have chosen us. 

How do I find out more?

Just get in touch with us to arrange a free consultation with Dave Mowle at your home. He will be talk you through the various design, planning, budgetry and construction issues that need to be considered.

Previous PRojects

Parsonage Terrace, Bakewell

Our client had initially been told that her attic did not have the required height to create a loft conversion as she explained when she first contacted us. On our first consultation visit we could see the problem but also a clear solution.


Our initial brief was a kitchen extension but at the client's request this grew into a much larger project that included the relocation of the main entrance to create a grand hallway, a hand-made kitchen, underfloor heating throughout the ground floor and a modern extension.

Asker Lane – Loft Conversion in Matlock

The clients wanted an extension which we could see straightaway was beyond their budget. But what we also saw was a fantastic loft conversion that gave them all they wanted and more but within a budget they could afford.

Scarthin, Cromford

After completing a rear extension for these clients they then asked us back to do a loft conversion. The trick here was to increase the light and landing space on the first floor, build a new staircase and add two rooms with skylights and cleverly…

Arrange a site visit

Book a a free initial consultation with Dave Mowle